D. Jason Palmer

Freelance writer

D. Jason Palmer is a freelance writer based in Florence, Italy.

(Courtesy of Cun-Zheng Ning)
A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
A photograph (a) shows native light emission from a heterostructure nanosheet in which spontaneous emission comes more or less uniformly from the entire sheet. A second photograph (b) under lasing condition shows that lasing modes are guided along the nanosheet; light is mostly visible from the edge of the nanosheets, indicating that guided modes are scattered off the edge. A schematic shows modes being guided along the nanosheet, forming two parallel cavities for the two colors (c).
Lasers & Sources

SEMICONDUCTOR LASERS: Two-color ‘nanosheet’ lasers light the way for displays and illumination

June 5, 2013
The quest for laser-based broadband emitters for lighting and other applications has received a boost, with researchers at Arizona State University unveiling a single, nanoengineered...
(Courtesy of RAL Space)
Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
Researcher Ali Hussain adjusts a dual-laser setup that measures isotope ratios. Designed for use on Mars, the system is being adapted to measure samples of common foods to pinpoint their geographic origin.
Research

SPECTROSCOPIC ANALYSIS: Laser for Mars aims to spot counterfeit foods on Earth

April 8, 2013
A laser system originally developed to investigate the prospect of past life on Mars could be on its way to proving the provenance of your olive oil.
(Courtesy of ORC)
A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
A dual-core fiber is shown in a schematic (a), as a preform (b), and as a finished fiber in scanning electron micrographs (c) and (d).
Fiber Optics

SPECIALTY FIBERS: Dual-core fiber has nanomechanical switching properties

Feb. 12, 2013
Researchers at the University of Southampton (Southampton, England) have shown off a novel dual-core fiber architecture that permits changes in the coupling between the cores,...